5-Diopter UL Fluorescent Magnifying Lamp - Big 5" Lens - Easy-adjust Arm - Quick Clamp Handy task & work lamp that doubles as high-power magnification tool Cool-burning & efficient 22W fluorescent daylight bulb bathes work area in non-glare light Internal cantilever system allows feather-touch arm adjustment - automatically holds position Precision 5-diopter glass lens increases viewed object size to 225% with minimal distortion Convenient on-off switch & no-flicker start; flip-up dust cover protects & keeps lens clean